Method and system for timestamp inclusion in virtual local area network tag

摘要

A method, system and apparatus time-stamp a data frame. The data frame includes a type field and data for transmission to a communication network. The data frame is received and a reception time for the data frame is determined. The value of the type field is determined. If the value of the type field indicates the data frame is a time-stamped frame, a timestamp field is inserted in the data frame. The timestamp field indicates the reception time.

主权项

1. A method for time-stamping a data frame, the data frame including a type field and data for transmission to a communication network, the method comprising:
receiving the data frame; determining a reception time for the data frame; determining a value of the type field, the type field indicating whether the data frame is a time-stamped frame; responsive to determining that the value of the type field indicates the data frame is a time-stamped frame;
calculating a length value, the length value indicating a length from an end of a length field to a start of a time stamp field, the length value including a length of the type field and a length of a data payload field containing the data, the length value indicating the position of the timestamp field;inserting the length field in the data frame prior to the data and prior to the type field, the length field including the length value; andinserting the timestamp field at a position in the data frame after the length field, the timestamp field, the timestamp field indicating the reception time.